I think its totally worthwhile. I used to brew a lot and bottle, which meant having over 200 full bottles and a bunch more emptied bottles. I had bought some flip top, which wasn't cheap and bought lots of beer in 750ml and 1L bottles to use for bottling. That was more pleasant than buying bottles. When I moved back to Canada from Chicago after grad school I had 72 full bottles in the uhaul, along with 2 dogs and 2 cats and a ton of houseplants. I opened the door and pointed it out to the border officials to be sure it wasn't an issue, they didn't want to know. I used to like having all those bottles to offer friends a good selection. Kegging is so much easier than bottling. People always enjoy getting themselves a beer from the keg/taps, and a large part of my enjoyment is social. I have a combined office space and rec room, one of my best buddies made a real habit of dropping by after he finished work for a half pint before heading home (he is in no way a freeloader).
I have moved across the country from Manitoba to Vancouver Island in a town where I don't know many people and Covid 19 has made it hard to meet new people (I am dying to have some BBQs etc.). I just got my kegerator setup going again and have a cider and a beer on. I am basically the only one drinking it now, I really like beer but I enjoy a beer with people. I still think kegging is worthwhile and agree that flexible serving size is one of the benefits. It can go both ways, not having the empties stacking up sometimes means the quantity consumed can sneak up on you, especially if you are inclined to to top up. I think bottling is cheaper but I won't go back.